According to the Urban Dictionary, "Awesome Possums" are people who:
value independent thinking, counter-culture, progressive politics, and have an appreciation for art and music, creativity, intelligence, and witty banter. Like Hipsters, Awesome Possums embrace "non-mainstream" Culture and trends but unlike them, they also embrace mainstream culture and trends due to the fact that most Awesome Possums make trends popular.
Yup. Sounds like Shi alright!